Moral: Satisfy Hunger is worthless for a midlevel Ranger or Rogue. Note that .243% is a fairly high failure probability in Angband. As a routine risk level, it is pretty much guaranteed to get you killed over the course of the game. (It is acceptable for killing valuable uniques, and other strategic risks.)

In any case, I don't like to use high mana, high-fail spells. It's safer to carry food and Scrolls of Identify, rather than wait around regenerating mana while awake monsters are created.